package java008_6;

import java.util.Scanner;

public class square_root {
	 public static void main(String[] args) {
	        Scanner sc = new Scanner(System.in);
	        int num = sc.nextInt();
	        for (int i = 1; i <= num; i++) {
	            if (i * i == num) {
	                System.out.println(i);
	                break;
	            } else if (i * i > num) {
	                System.out.println(num+"的平方根在"+(i - 1) + "到" + i + "之间");
	                break;
	            }
	        }
	    }
}
